Method of making tape for electrical purposes



Feb. 25, 1930. J. B. SIDEBOTHAM, JR 1,748,737

METHOD OF MAKING TAPE FOR ELECTRICAL PURPOSES Filed Feb. 8, 1928 BY APatented Feb. 25, 1930 p v UNITED STATES PATENT-Y orrlce I a 301E113.SIDEQBOTHAM, JR, OF PHILADELPHIA, PENNSYLVANIA mn'rnon or mind 'rarn nonmnornroan ruarosns Application filed February $1928. Serial No. 252,740.

This invention, stated in its broadest terms, relates to a method ofmaking tape and has more especial relation to the method of mak- ,ingtape for electrical purposes.

6] The object of, the present invention may be said to reside in theprovision of means -whereby thread from a left hand twist yarn, ofsingle ply, and thread-from a right hand twist yarn, either single ormultiple ply, are

1 fed to conditioning apparatus, and thereafter introduced to a loom forweaving of the threads, the resultant product being a tape which willlie relatively flat in use in contradistinction to becoming twisted orcurled, thus providing for the more eflicient handling of the tape inthe various uses to which it istobe ut.

The inv ntion consists of the method hereinafter described and finallyclaimed.

In order to describe fully the method embodyin my invention, theaccompanying sheet ofdrawings is provided, in which:

Figs. 1, 2, and 3 diagrammatically illustrate the manner of presenting,winding, and treating the thread.

' Fig. 4:, represents loom apparatus; and

Fig. 5, is a view of the finished tape. According to the presentinvention, it is desirable to provide a. tape for electrical urposes inwhich the same as unwound rom its spool lies relatively flat, so thatthe operator can more-conveniently use the tape without the usualtrouble of curling and twisting, This I accomplish by taking, forexample, one or more left hand twisted yarns, of single ply, designated1, in Fig. 1, the threads in which left hand twist yarn, of single ply,are passed through a guide- 3, and directed to reeds 4 and 6. Stopmechanism 5, is provided, as is usual in conventional mechanism of thischaracter. Small-rollers 7 and 8 are. provided over which the combinedthreads travel and are introduced to and wound upon a large roller 9.This operation is renewed as often as desirable," and in the presentinstance, forexplanatory purposes, three large' 'rollers 9 are providedwith thread, some of which threads may have been wound left handed andsomerighthanded. As amat' diagrammatically the :yarn. The threads fromthe large rollers 9 moisture from the threads.

of fact, in' the drawings as shown at the right hand side of Fig. 2, thefirst two large rollers 9 may have wound thereon right 1 hand twistedyarn while the remaining roller may have wound. thereon left handtwisted are guided to and through a container 10 in which is provided asuitable bath or liquid, and before egressing from the container 10 thethreads are guided over rollers'and pass through a wringer 11 forremoving excess After leaving the wringer the threads pass through thedrier 12, which is of conventional form, and

guided to and wound upon large rollers 13, the left hand twisted threadbeing maintained uppermost during a guiding period. These rollers 13 arethen removed from the above described apparatus and placed upon theapparatus shown in Fig. 3, and the threads are passed between tensionrolls 14 to three small rolls 15, 16, and 17 The above described steps,described with respect to Figspl, 2, and 3 of the drawings, may betermed beaming, dressing, and slashing operations. These three rolls 15,16, and 17 are then positioned with respect to a-loom structure 18, asshown in Fig. 4, which is of conventional form, and the left handthreads of single ply, and theright hand threads, either single ormultiple ply, having been properly treated and dried are. presented tothe loom and regular weaving takes place, with the exception that thethreads as introduced to the loom are twisted left handed of single ply,and right handed of single" ply, so that when the final product 19, asshown in Fig. 5, comes from the loom the fabric lies relatively flat incontra-distinction to being coiled or wrinkled, as in con ventional tapeas used forelectrical purposes. This is particularly advantageous whenthe tape is being unwound from a spool, as is readily apparent and hasbeen already pointed out in the object so that repetition thereof issurplusage,

I am aware that the invention may be embodied in other specific formswithout de. art- 'ing from the spirit or essential attri utes embodimentto be considered in all respects as illustrative. and not restrictive,reference being had to the ap ended claim rather than to the foregoingescription to indicate the scope of the invention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

The herein described art of making tape of narrow fabric loom weaves ofmore than one strip at a time for electrical purposes which consists intaking bobbins of right and left hand twisted thread of single ply,presenting first the thread to reeds and then winding upon largeseparate rolls left hand twisted thread and winding upon other largerolls right hand twisted thread, presenting said thread to a suitableliquid dressing,

which dressing has the tendency to strengt en said single ply thread,squeezing excess liquid from said thread, then drymg the thread andfeeding the same to separate large rolls, during which feeding of threadthe left hand twisted thread is maintained uppermost or above the righthand twisted thread, then winding the thread separately upon smallrolls, and thereafter interweaving said left hand and right hand twistedthread from the small rolls by a loom arranged to operatively receivethe thread from said small rolls, the resultant product being a tape forelectrical purposes adapted to lie flat and uncurled.

JOHN B. SIDEBO weave?-

